Improvement in founders  patterns



Founders Patterns.

G L D Patented May v11, 1875.

THE GRAPHIC GDJH OTO .-LITILSQ 41 PARK PLAGLNX- STEPHEN J.' GOLD, OF CORNWALL, CONNECTICUT;

llVIPROVEMENT IN FOUNDERS PATTERNS.

Specication founing part of Letters Patent No. 163,010, dated May 11, 1875; application filed March 8, 1875.

To all whomz't may concern:

Beit known that I, STEPHEN J. GOLD, of Cornwall,in the county of Litchfield and State of Connecticut, have invented certain Improvements in Founders Patterns, of which the following is a specication:

This invention :relates chiefly to patterns for making castings which are designedto be wholly, or in a considerable portion thereof, of a uniform thickness, and is particularly adapted to the construction of patterns for casting stoves, furnaces, kettles, and other articles where a uniform thickness in the casting is required, and Where the ordinary mode of construction Would involve considerable expense. In such cases, and in some others involving conditions already mentioned, this invention I is designed to supersede both the Wood and metal patterns usually employed, and to furnish, at a cheap rate, patterns adapted to be continuously used by the founder in the same Way that metal patterns are used.

The leading feature of this invention consists in forming the outer surface of the pattern of sheet metal, sustained by suitable tillin g, substantially as hereinafter described.

r Anotherpart of the said invention consists in the insert-ion ot' wire or its equivalent in such pattern to give it additional strength and firmness, as hereinafter described.

Another part of the said invention consists in connectingthe sheet-metal plates ot' the pattern by rivets or solder, or equivalent means,

substantially as hereinafter described, Whereby they are prevented from springing away from each other. y

Figure l is a plan of a pattern constructed according to my invention, the upper plate bein g partially removed to show the internal construction. Fi g. 2 is a side elevation of the same pattern, a portion of the outside plates and filling being removed to show internal parts. Fig. 3 is a vertical central section of the same pattern.

In the form of patterns shown in the drawings the upper and under sides of the at portion are made of fiat plates of sheet metal A and B, preferably tin plate, inclosing a filling, C, of proper thickness to form with the plates A and B the proper thickness of pattern required.

I prefer to make the filling C of junkboard, which I find, on eiperiment, to possess the necessary qualities.

To close the edges of the pattern, attach the plates A and B to each other, and secure the filling C in place, I insert pieces of Wire D between the plates at the edges, as shown, and

solder them strongly and firmly to both of the v plates A and B, and ll in the space between the edges of the plates and the wire with solder, so as to form an even and proper edge for the pattern, as shown.

Other Wires, E E, may loe-inserted in the pattern between the plates Where additional strength is necessary, and soldered or not to the plates A and B through holes in the plates. The plates A and B may also be prevented at any point from spreading apart by rivets or solder connecting the one tothe other, as shown at F F. The flat portion of the pattern is also represented in the drawings as being further strengthened by a Wire, c, surrounding the aperture Which is cut through it to open communication with the cylindrical portion of 'the pattern. The cylindrical portion of the pattern is made in a manner simifar to that described for the flat portion, the Outer and inner sides being made of plates of tin G and H, or other sheet metal, with a filling, I, of junk-board or other appropriate material, and strengthened by wires b and c, as shown, and lled in and secured With solder, as described in relation to the flat portion of the pattern.

To secure a smooth and uniform surface, the plates Gr and H are joined edge to edge, and, to give strength to the joint, a strip or scrap of tin is soldered across that side of the joint which is inside of the pattern, as shown at d in Fig. 2. flhis mode ofjoining should be observed Wherever two plates of the pattern meet in the same plane.

Whenever it is necessary to form narrow tapering ledges upon the casting to receive other plates, as is commonly the case with reference to stove and furnace plates, these can be readily formed upon the pattern by folding a strip of tin into the form of the ledge required, and soldering it to the main plate Vin the proper form andposition; or any other mode of forming or attaching such or other projections that may be preferred may be used.

Patterns made in the manner described are found to possess the requisite sti'ness and other qualities necessaryto fit them for use in the place of metal patterns, and can be made y at a triing cost compared with that of the construction of even wooden patterns, for most of the purposes to which this construction is of which are made of sheet metal and combined with an inner lling, substantially as hereinbefore set forth.

2. A founders pattern, embodying the cornbination with the sheet-metal shell or sides, and a lling between them, of strengtheningpieces inserted between the edges or other portions of the outside plates, substantially as hereinbefore set forth. p,

3. The combination, with the said outside plates and lling above described, of the connections F, connecting the outside plates to each other, substantially as hereinbefore set forth..

STEPHEN J GOLD.

Witnesses:

THos. P. How, EDWIN M. DONNELLY. 

